Metering and dispensing closure

ABSTRACT

A metering and dispensing closure for a container wherein two rotatable disks rotate in conjunction with a stationary cap member to afford accurate measuring of a powder material and dispensing of it. The disks and the container cap afford a consistent measuring of the powder material, as well as provide a variety of drive members which can be utilized with the dispensing closure.

CROSS-REFERENCES TO RELATED APPLICATIONS

This is a continuation of U.S. patent application Ser. No. 11/404,518,filed Apr. 14, 2006 now U.S. Pat. No. 7,815,072, which is acontinuation-in-part of U.S. patent application Ser. No. 10/709,449,filed May 6, 2004, now U.S. Pat. No. 7,090,098.

BACKGROUND

The field of the invention is metering and dispensing devices for apowder or granular material. More particularly, it relates to a powderdispensing closure which is connected to a container and can dispenseaccurate amounts of the powder into a liquid or container.

Dispensers of the type concerned with in this invention are disclosed inU.S. Pat. No. 4,032,050 and No. 5,469,992. Both of these dispensersdisclose a rotatable metering disk (80 and 20, respectively) formaterials to be dispensed. There are problems with a rotatable measuringpiece and stationary feed pieces. These cannot effect a desired internalstirring action of the container contents. Without this action, asignificant amount of powder can be left in the container and notdeposited into the measuring chamber.

The prior art does not provide a metering and dispensing closure whichis connectable to a container and affords suitable sealing for powdermaterials which are hygroscopic.

Currently, the only reliable and cost effective method for dispensingpowdered chemicals from small containers (between 1 and 4 kg), is to usea water spray and screen approach. There are two important limitationswith these systems; the feed-rate is very inconsistent, and the powderformulations are limited. Such a method is described in U.S. Pat. No.5,007,559.

The feed-rate varies over at least a 3:1 range and sometimes more due tothe amount of powder remaining in the container, any bridging that mayoccur due to solidification near the screen, water pressure, spraypattern variation, water temperature and batch to batch variations. Tocontrol the amount of product dispensed, these systems typically requirea concentration feedback control sub-system to compensate for theirvariable feed-rates. By far the most common is the conductivity feedbackcontrol used in dishwashing applications. Stated another way, because ofthe feed-rate variation, “spray/screen” powder dispensing systemsnormally can not be used in applications where a repeatable dose isrequired. This invention avoids this limitation by providing a preciseand consistent metered dose based on a volumetric measurement.

The “spray/screen” dispensers work only with a limited range of powdersand formulations. Detergents, the most commonly fed powders, are limitedto formulations that will not create excess exothermic heat if the sprayshould penetrate into the powder. This has typically meant that thecaustic (typically NAOH or KOH) level needs to be kept below about 40%to prevent the possibility of steam generation within the containerwhich can be a safety issue. The metering and dispensing closure of thisinvention would remove this limitation and allow more powerful detergentpowders to be formulated with perhaps up to 70% caustic concentrationsfor soft-water dishwasher applications. This would represent a 40% to50% increase in “power” in a single container.

Many powders simply cannot be fed at all using the “spray/screen”method. These include any powders that tend to absorb water quickly andturn into a gel before they can be dissolved at the screen. The meteringand dispensing closure of this invention obviates this.

SUMMARY OF THE INVENTION

The shortcomings of the prior art are overcome by the metering anddispensing closure for a container of this invention which includes acontainer cap member attachable to the container. The container capmember has a first side adapted to be mounted facing an inside of thecontainer and a second side adapted to be mounted facing an outside ofthe container. A rotor is mounted on each side of the cap to selectivelyopen and close an aperture in the cap member.

In one embodiment, a measuring chamber is positioned in the containercap member. There is a first rotatable disk member having at least onepassage which is mounted on the first side of the container cap member.There is also a second rotatable disk member having a passage thereinwhich is mounted on the second side of the container cap member. Whenthe disk members are rotated, powder material passes sequentiallythrough the one passage in the first disk member, into the measuringchamber of the cap member and then through the passage of the seconddisk.

In one aspect, the first and second rotatable disk members are connectedto each other.

In another aspect, the second rotatable disk member includes a driveshaft engagement portion.

In yet another aspect, the second rotatable disk member includes a gearfor engagement by a complementary gear of a drive gear.

In a preferred embodiment, the cap member includes threads forattachment to complementary threads of the container.

In another preferred embodiment, there is provided a powder dispensingapparatus which includes a container cap member attachable to thecontainer, the container cap member having a first side adapted to bemounted facing an inside of the container and a second side adapted tobe mounted facing an outside of the container. A measuring chamberpositioned in the container cap member.

There is a first rotatable disk member having at least one passagetherein, the first rotatable disk member mounted on the first side ofthe container cap member. A second rotatable disk member has a passagetherein with the second rotatable disk member mounted on the second sideof the container cap member, the first and second rotatable disk membersconnected to each other with the second rotatable disk member includinga drive shaft engagement portion. There is also a drive shaft connectedto the drive shaft engagement portion and a drive member connected tothe drive shaft.

When the disk members are rotated, powder material passes sequentiallythrough the one passage in the first disk member, into the measuringchamber of the cap member, and then through the passage of the seconddisk.

Some embodiments of the invention are directed to a dispensing closurefor a container. The dispensing closure comprising a cap adapted to bereceived on the container and a first and second movable member coupledto the cap. The cap has an inside face, an outside face, and an apertureextending from the inside face to the outside face through the cap toallow materials within the container to be dispensed. The first movablemember is positioned adjacent the inside face of the cap to selectivelyblock the aperture in the cap. The first movable member is movablebetween a first position in which the aperture is blocked and a secondposition in which the aperture is not blocked. The second movable memberpositioned adjacent the outside face of the cap to selectively block theaperture in the cap. The second moveable member is movable between afirst position in which the aperture is blocked and a second position inwhich the aperture is not blocked. Movement of the first moveable memberand the second moveable member is sequenced such that at least one ofthe moveable members is always blocking the aperture.

In some embodiments, a plurality of resilient fingers are coupled to thefirst movable member and extend from the first movable member toward thecap. The fingers are movable with the first movable member between aposition in which the fingers are not aligned with the aperture and aposition in which the fingers are aligned with the aperture. Theresilient fingers extend into the aperture of the cap when the fingersare in the aligned position. In some embodiments, the fingers arealigned with the aperture in the cap when the first movable member is ina position that blocks the aperture and the second movable member is ina position in which the aperture is not blocked. Additionally, when thefingers are not aligned with the aperture in the cap, the fingerscontact the cap and are biased by cap towards a bent over position, andwhen the fingers are aligned with the aperture in the cap, the fingersresiliently return to a substantially unbiased position and extend intoaperture. In some embodiments, the fingers are positioned within arecessed portion of the first movable member, the recessed portionextending away from the cap.

In some embodiments, the movable members can be rotors or disks thatrotate between the first and second position. Further, depending uponthe configuration of the moveable members can have a passage defined inthem, wherein rotation of the first and second movable membersselectively and sequentially place the first and second passages incommunication with the aperture. As such, the first passage can berotatably offset relative to the second passage.

In some embodiments, the second movable member comprises an edge thatcontacts and passes over the aperture in the cap when the second movablemember moves from the second position back to the first position. Theedge comprises a generally angled surface terminating at a pointdefining an acute angle. This edge can be used to scrape or otherwiseremove cake, stuck, or otherwise encrusted materials from the cap. Insome embodiments, the generally angled surface of the edge includes aconcave portion.

Some embodiments of the closure also include a hook-liked memberextending from the first movable member adjacent the cap. The hook-likedmember is configured to drive granular or powdered materials contactedby the hook-like members toward the center of the cap.

In some embodiments, the cap and first moveable member have asubstantially concave shape. This shape can help to substantially fullydeplete dispensable materials from a container. In some embodiments, thesecond movable member also has a substantially concave shape.

Some embodiments of the invention are directed toward a dispensingapparatus. The dispensing apparatus comprising a frame, a funnel coupledto the frame and supported to rotate relative to the frame, and a drivemember coupled to the frame and the funnel, the drive member actuatableto rotate the funnel relative to the frame. The dispensing apparatus canalso include a conduit in fluid communication with a water source andthe funnel. The dispensing apparatus dispenses a container containing agranular or powdered material and having a closure that selectivelydispenses the material from the container via rotation of at least aportion of the closure. The container and closure are supported by theframe and positioned adjacent the funnel. The closure and funnel are inrotational engagement such that rotation of the funnel causes rotationof at least a portion of the closure. The closure dispenses thematerials located in the container into the funnel.

In some embodiments, the closure comprises a cap adapted to be receivedon the container and a first and second rotor positioned on oppositesides of the cap. The cap has an inside face, an outside face, and anaperture extending from the inside face to the outside face through thecap to allow materials within the container to be dispensed. The firstrotor is positioned adjacent the inside face of the cap to selectivelyblock the aperture in the cap. The first rotor is movable between afirst position in which the aperture is blocked and a second position inwhich the aperture is not blocked. The second rotor is positionedadjacent the outside face of the cap to selectively block the aperturein the cap. The second rotor is movable between a first position inwhich the aperture is blocked and a second position in which theaperture is not blocked. Movement of the first rotor and the secondrotor is sequenced such that at least one of the rotors is alwaysblocking the aperture. In some embodiments, the second rotor includes aprojecting member that extends toward the funnel and engages a portionof the funnel, wherein the engagement of the projecting member with thefunnel provides a driving engagement between the funnel and the secondrotor. Additionally, the funnel includes a projecting member thatextends toward the second rotor and engages the projecting member on thesecond rotor.

In some embodiments, the drive member comprises a motor and atransmission assembly extending between the funnel and the motor. Thetransmission assembly can include a belt extending between the motor andthe funnel, a gear train, and other known transmission configurations.

Some embodiments of the invention are directed toward a method ofdispensing a powder or granular material from a container. The methodcan include providing a dispensing assembly discussed above, actuatingthe drive member, and rotating funnel via actuation of the drive member.The method further includes engaging a portion of the closure with thefunnel, and rotating at least a portion of the closure via the rotationof the funnel. The method also includes dispensing the powdered orgranular material from the container and through the closure and intothe funnel via rotation of at least a portion of the closure. The methodof dispensing a powdered or granular material from a container can alsoinclude drawing water from the water source and through the conduit tothe funnel, and flushing the powdered or granular material from thefunnel with the water.

Another embodiment of the invention is directed toward a method ofdispensing a powder or granular material from a container. The methodincludes providing a dispensing assembly described herein and dispensingthe powdered or granular material from a container and through a closureand into a funnel via rotation of at least a portion of the closure. Themethod also includes drawing water from a water source and through aconduit to the funnel, actuating a drive member, rotating funnel viaactuation of the drive member; and flushing the powdered or granularmaterial from the funnel with the water while rotating the funnel.

Some embodiments of the invention are directed toward a system fordispensing a powder or granulated product having greater than 40%caustic. The dispensing assembly comprising a distributable containerhaving an opening and containing the powder or granulated product havinggreater than 40% caustic, a closure coupled to the distributablecontainer, and a dispenser fixed at a dispensing location adapted toreceive the closure of the container and selectively operate the closureto dispense the powder or granulated product having greater than 40%caustic. The closure is configured to prevent moisture from entering thecontainer and contacting the powder or granulated product having greaterthan 40% caustic. The closure comprises a cap, a first rotor, and asecond rotor. The cap is adapted to fit over and secure the opening ofthe distributable container. The cap has a central axis and an openingtherein positioned off-center from the central axis. The cap also has aninner surface and an outer surface. The first rotor is coupled to theinside of the cap and positioned to rotate about the central axis of thecap. The first rotor is rotatable between a position in which it blocksthe opening of the cap and a position in which it does not block theopening of the cap. The second rotor is coupled to the outside of thecap and positioned to rotate about the central axis of the cap. Thesecond rotor is rotatable between a position in which it blocks theopening in the cap and a position in which it does not block the openingof the cap. The rotation of the first rotor and the second rotor issequenced such that at least one of the rotors always block the openingin the cap to prevent moisture from entering the container andcontacting the powder or granulated product having greater than 40%caustic. The dispenser is fixed at a dispensing location and is adaptedto receive the closure of the container. The dispenser selectivelyoperates the closure to dispense the powder or granulated product havinggreater than 40% caustic. In some embodiments, a power source isoperatively coupled to the dispenser and adapted to rotate the rotorsrelative to the cap when the closure is mated to the dispenser therebyrotate the first rotor between the first position and the secondposition of the first rotor and thereby rotate the second rotor betweenthe first position and the second position of the second rotor to allowfor dispensing of the powder or granulated product having greater than40% caustic from the distributable container to the dispenser.

A general object of the invention is to provide an improved dispensingdevice for a powder or granular material.

Another object is a powder dispensing device which can provide a sealfor the powder being dispensed.

Still another object is a dispensing device of the foregoing type whichis easily connected to a container.

Yet another object is a dispensing device of the foregoing type whichcan be driven by a variety of drive means.

Still yet another object is a dispensing device of the foregoing typewhich can accurately measure a powder or granular material beingdispensed.

Further objects, advantages, and/or aspects of the present invention,together with the organization and operation thereof, will becomeapparent from the following detailed description of the invention whentaken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevation view and in partial section showing thepowder dispensing apparatus of this invention in conjunction with areceptacle.

FIG. 2 is an assembly view of the component parts of the dispensingapparatus.

FIG. 3 is a top view of the dispensing apparatus in a first position.

FIG. 4 is a view similar to FIG. 3 showing the dispensing apparatus in asecond position.

FIG. 5 is a view similar to FIG. 3 showing the dispensing apparatus in athird position.

FIGS. 3A, 4A and 5A are views taken along lines 3A-3A, 4A-4A, and 5A-5Aof FIGS. 3, 4 and 5, respectively.

FIG. 6 is a perspective view of another embodiment of the dispensingapparatus in conjunction with a receptacle.

FIG. 7 is a view similar to FIG. 1 showing another embodiment.

FIG. 8 is a partial view in section illustrating a drive mechanism forthe FIG. 7 embodiment.

FIG. 9 is a view similar to FIG. 7 showing yet another embodiment.

FIG. 10 is a view taken along line 10-10 of FIG. 9 showing the drivemechanism.

FIG. 11 is a view similar to FIG. 1 showing still another embodiment.

FIG. 12 is a view illustrating the drive mechanism for the FIG. 11embodiment.

FIG. 13 is a perspective view of still another embodiment of adispensing assembly embodying inventive aspects and container having aclosure embodying inventive aspects.

FIG. 14 is a perspective view of the dispenser shown in FIG. 13.

FIG. 15 is a front view of the dispenser shown in FIG. 13.

FIG. 16 is a side view of the dispenser shown in FIG. 13.

FIG. 17 is a top view of the dispenser shown in FIG. 13.

FIG. 18 is a perspective view of the dispenser shown in FIG. 13 whereinthe housing of the dispenser is shown in phantom to reveal certainsubassemblies of the dispenser.

FIG. 19 is an exploded view of the dispenser shown in FIG. 13.

FIG. 20 is an exploded view of certain components and subassemblies ofthe dispenser shown in FIG. 13.

FIG. 21 is a partial side view of the dispenser shown in FIG. 13,revealing the inner components of the dispenser.

FIG. 22 is a perspective view of a funnel utilized in the dispensershown in FIG. 13.

FIG. 23 is a side view of the funnel shown in FIG. 22.

FIG. 24 is a side view of a closure embodying aspects of the inventionand adapted to be utilized with the dispenser shown in FIG. 13.

FIG. 25 is a bottom view of a closure shown in FIG. 24.

FIG. 26 is an exploded view of the closure shown in FIG. 24.

FIG. 27 is a top view of the closure shown in FIG. 25.

FIG. 28 is a perspective view of an alternative closure adapted to beutilized with the dispenser shown in FIG. 13.

FIG. 29 is an exploded view of the closure shown in FIG. 28.

FIG. 30 is a top view of the closure shown in FIG. 28.

FIG. 31 is a perspective view of an alternative closure adapted to beutilized by the dispenser shown in FIG. 13.

FIG. 32 is another perspective view of the closure shown in FIG. 31.

FIG. 33 is a bottom view of the closure shown in FIG. 31.

FIG. 34 is a side view of the closure shown in FIG. 31.

FIG. 35 is a top view of the closure shown in FIG. 31.

FIG. 36 is an exploded perspective view of the closure shown in FIG. 31.

Before any embodiments of the invention are explained in detail, it isto be understood that the invention is not limited in its application tothe details of construction and the arrangement of components set forthin the following description or illustrated in the following drawings.The invention is capable of other embodiments and of being practiced orof being carried out in various ways. Also, it is to be understood thatthe phraseology and terminology used herein is for the purpose ofdescription and should not be regarded as limited. The use of“including,” “comprising,” or “having” and variations thereof herein ismeant to encompass the items listed thereafter and equivalents thereofas well as additional items. The terms “mounted,” “connected,” and“coupled” are used broadly and encompass both direct and indirectmounting, connecting and coupling. Further, “connected” and “coupled”are not restricted to physical or mechanical connections or couplings,and can include electrical connections or couplings, whether direct orindirect. Finally, as described in subsequent paragraphs, the specificmechanical configurations illustrated in the drawings are intended toexemplify embodiments of the invention. Accordingly, other alternativemechanical configurations are possible, and fall within the spirit andscope of the present invention.

DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

Referring to FIGS. 1-5, the metering and dispensing closure generally 10is shown in conjunction with a container 12 supported in a dispenserassembly or receptacle 14 for housing the closure 10. A water intakeconduit 16 controlled by solenoid valve 18 is utilized to introducewater into the dispenser assembly or receptacle 14. A water solutionoutlet conduit 20 is also in communication with the dispenser assemblyor receptacle 14. A drive member 22 drives a drive shaft 24, the driveshaft being journalled in the collar 26 with a seal 28.

Referring to FIG. 2, it is seen that the metering and dispensing closuregenerally 10 is composed of three basic components. There is a capmember 30 with an upstanding wall 31 and internal threads 32 forengaging complementary threads on the container 12. There is also arotatable disk 36 with a raised peripheral wall 37 as well as a cutawayportion 38. Rotatable disk 36 is seated inside the cap member 30. Thethird component is a rotatable disk 43 with a raised peripheral wall 46and a stub shaft 48 with projections 49. These fit through an opening 34in the cap member 30 in a manner that the projections 49 engage slots 41in the rotatable disk 36. Rotatable disks 36 and 43 are rotated by theshaft 24 connected to the stub shaft 48.

The metering and dispensing closures or embodiments 10A, 10B, 10C and10D shown in FIGS. 6, 7, 9, and 11, respectively, employ some of thesame basic components as previously described for embodiment 10, exceptthey have an A, B, C or D suffix.

Embodiment 10A illustrates two dispensing closures for the container 12Aas well as two drive motors 60A for the drive shafts 24A. The driveshafts 24A rotate the rotatable disk 43A as well as an internalrotatable disk 36A not shown.

Embodiment 10B shown in FIGS. 7 and 8 differs from that shown for 10 inthat it has a different drive mechanism for rotating rotatable disks 43Band 36B. This is accomplished by the motor 62B and the drive gear 63Bwhich engages the ring gear 64B on the rotatable disk 43B. Rotation ofdisk 36B is effected by the stub shaft 48B connected to rotatable disks43B and 36B. Another difference is the location of the water outletconduit 20B directly beneath the metering and dispensing closure 10B.The interaction of the previously described components is seen in FIG.8.

The FIG. 9 10C embodiment is similar to that of the 10B embodiment shownin FIG. 7, but includes a motor 62C connected to worm drive gear 63C fordriving the ring gear 64C on the rotatable disk 43C. Stub shaft 48B isinterconnected with disks 43C and 36C to provide rotation thereof. Thepositioning of the rotatable disks 36C and 43C with respect to the capmember 30C is illustrated in FIG. 10.

The embodiment 10D shown in FIG. 11 differs from the embodiments shownin FIGS. 6, 7 and 9 in that yet another means for rotating the disks 43Dand 36D is illustrated. In this embodiment, a motor 60D drives the driveshaft 71D having the sprocket 74D for engaging a chain 75D which in turndrives the sprocket 78D on the drive shaft 24D. Drive shaft 24D effectsrotation of stub shaft 48D and accordingly disks 43D and 36D.

A better understanding of the metering and dispensing device shown inFIGS. 1-5 will be had by a description of its operation. Referring toFIGS. 1 through 5A, and dispensing closure 10, a container 12 with apowdered material is supported in the receptacle 14. Water will beintroduced into it through the water intake conduit 16. The metering anddispensing closure 10 is attached to the container 12 with the capmember 30, and rotatable disks 36 and 43 shown in the position in FIGS.3 and 3A. In this position, powder material is free to enter into themeasuring opening or chamber 33 in cap member 30 as it is uncovered bydisk 36 and cutaway 38; however, it cannot pass into the receptacle 14as its passage is blocked by rotatable disk 43, such as by wall 35.Activation of the drive member 22 and rotation of the drive shaft 24causes the upper rotatable feeder disk 36 and the lower rotatable disk43 to move to a position shown in FIGS. 4 and 4A. In this position, itis seen that no more powder material can enter the opening 33 which nowbecomes a measuring chamber. Continued rotation of the disks 36 and 43positions them as shown in FIGS. 5 and 5A. Here it is seen that opening33 is now positioned over opening 45 to allow the powdered material toflow into receptacle 14 and be mixed with the water. The mixed materialthen exits by means of the water outlet solutions conduit 20.

The operation of metering and dispensing closures 10A, 10B, 10C and 10Dis substantially the same as described for metering and dispensingclosure 10A. The differences are in the use of different drivemechanisms, such as shown by the motors 60A, 62B, 66C and 70D with thedescribed associated drive mechanisms.

An important feature of this embodiment is in the stationary position ofthe cap member 30 in conjunction with the rotation of the rotatabledisks 36 and 43. This feature provides the advantage of accuratedepositing of powder material into the measuring opening 33. This iseffected by the rotation of the disk 36 which causes a stirring of thepowder inside the container 12 and consistent depositing of the powdermaterial into the measuring opening 33. Another advantage in having thecap member 30 remain stationary with respect to disks 36 and 43 is thatit can be manufactured more easily.

The dispensing closure of this invention has been described inconjunction with particular configurations of receptacles. It should beunderstood that any type of receptacle can operate in conjunction withthis dispensing closure. They do not necessary have to have a receptaclethat contains water. For example, they could be utilized in a receptacleand supported therein where the powder material would drop into anothercontainer having a liquid predisposed therein. Neither is it necessarythat the dispensing closure be employed in conjunction with a receptacleemployed with water. Other liquids such as water miscible and immisciblesolvents including water and ether could be employed.

The preferred material for manufacturing cap member 30 and disks 36 and43 is polypropylene. However, other chemical resistant resinous plasticmaterials can be employed such as polyethylene or Teflon®. If desired, alubricant can be added to the plastic materials.

Referring to FIGS. 13-30, additional embodiments of the dispensingassembly 14 and the metering and dispensing closure 10 are shown. Thedispensing assembly 14′ of this embodiment has many features in commonwith the embodiments discussed above. Accordingly, such features will begiven a common number. Similarly, the dispensing closure 10′ also hassimilar features to the dispensing closures 10 discussed above and willfollow the numbering scheme discussed above.

With reference to FIG. 13, a dispensing assembly 14′ is shown mated to acontainer 12′. The closure 10′ embodying aspects of the invention isattached to the container. With reference to FIGS. 18-22 is can be seenthat the dispensing assembly 14′ includes a cradle 55′ adapted toreceive the closure 10′ and a portion of the container 12′ . Thedispensing assembly 14′ also includes a water intake conduit 16′controlled by a valve 18′ to introduce water into the receptacle 14′, afunnel assembly 57′ to receive dispensed chemicals and water, and awater solution outlet conduit 20′ in communication with the funnelassembly 57′. The dispensing assembly 14′ also includes a drive member22′ that drives the funnel in a rotary motion, which in return drivesthe closure 10′ between dispensing and non-dispensing positions.

With further reference to FIGS. 18-21, it can be seen that water inletconduit 16′ has a first portion 16A′ and a second portion 16B′ separatedby an air gap 17′. The air gap 17′ serves as a backflow preventiondevice. As water or other diluent flows, it flows through the firstportion 16A′ of the conduit 16′ and then flows across the air gap 17′into the second portion 16B′ of the conduit 16′. In this second portion16B′ of the conduit 16′, the water flows toward the funnel assembly 57′.In the illustrated embodiment, the second portion 16B′ has achannel-like configuration. Once the water leaves the second portion16B′ of the water inlet conduit 16′, the water then flows through thefunnel assembly 57′ to flush dispensed chemicals out of the funnelassembly 57′.

As illustrated in this embodiment, the funnel assembly 57′ has a uniquestructure. Specifically, as best illustrated in FIGS. 22 and 23, thefunnel assembly 57′ is provided with a means for rotating. Morespecifically, the drive member 22′ provides power to the funnel assembly57′ to drive the funnel assembly 57′ in a rotary motion. The rotarymotion of the funnel assembly 57′ serves two purposes in thisembodiment. First, the rotary motion allows the water to flush theentire funnel assembly 57′ and prevent any caking or other deposits fromremaining in the funnel 57′. Additionally, the rotary motion allows thefunnel assembly 57′ to be used to drive the closure 10′ betweendispensing and non-dispensing positions. This helps to avoid somepotential problems that may be seen in the first embodiment of thedispenser or receptacle 14′. Specifically, in the current embodiment,the chances of the drive member 22′ contacting the chemical-watersolution are drastically reduced. In the first embodiment, if the seal28 leaked, the drive member 22 could potentially be ruined by contactwith the chemical solution. In this embodiment, the drive member 22′ isnot positioned where liquids can easily contact the drive member 22′.

In the embodiment illustrated in FIGS. 18-21, the funnel 57′ issupported in the housing of the dispenser 14′ in a bearing typerelationship. The funnel 57′ is provided with drive connection 58′. Inthe illustrated embodiment, the drive connection 58′ is a toothedportion that engages a similarly toothed belt that is powered by amotor. However, in other embodiments, the drive portion can beconfigured other ways. For example, the drive portion can be given agear tooth profile that can be driven directly by a motor or other geartrain. Additionally, the funnel can be powered by other means known andunderstood in the art.

As best shown in FIG. 23, the inside of the funnel 57′ is provided witha projecting member, such as a finger or tab 59′ that extends upwardfrom the inner surface of the funnel 57′. As explained in greater detailbelow, this tab 59′ extends toward and engages a portion of the closure10′ to selectively drive the closure between dispensing and nondispensing positions. The tab 59′ illustrated in this embodiment is justone of many ways to drive the closure 10′ with the funnel 57′. It shouldbe understood that many other means can be used to drive the closurewith the funnel, such as an engagement between the periphery of theclosure 10′ and the funnel 57′. Further, the tab 59′ from the funnel 57′could be received within a recess on the closure 10′ in someembodiments.

Also, as illustrated in FIGS. 22 and 23, the funnel can be provided witha device so that the position of the funnel and the closure can besensed or otherwise determined by the dispenser 14′. In the illustratedembodiment, a magnet 61′ is coupled to the funnel 57′ and sensed by thedispenser 14′. A Hall effect sensor can be used to sense the magnet.With such a device, the dispenser can always know the rotationalposition of the closure and the funnel 57′ and stop the funnel 57′ andthe closure 10′ in a predetermined position after a select number ofrotations. Although the use of a magnet and Hall effect sensor aredisclosed, other embodiments can employ other position sensingtechniques by using optical encoders, contact sensors, as well as otherknown techniques. Furthermore, although the position sensing device orportion thereof is coupled to the funnel 57′ in this embodiment, theposition sensing device can be coupled to other features such as themotor, the closure, the transmission assembly and the like.

Referring to FIGS. 24-27, a metering and dispensing closure 10Eembodying inventive aspects is illustrated. This metering and dispensingclosure is composed of the three basic components discussed above in theprevious embodiments (i.e., a cap member 30, rotatable disk 36, androtatable disk 43). However, this embodiment also includes additionalfeatures, such as the projecting tab 66E mentioned above to allow theclosure 10E to be driven by the funnel 57′. Additionally, as discussedin greater detail below, the closure also includes one or more resilientFIGS. 68E adapted to assist with clearing out an opening in thedispensing closure 10E. Further, the closure 10E includes a scrapingmember 70E to clean and prevent dispensed chemicals from caking on theoutside of the closure.

Briefly reviewing the basic structure of the closure 10E, there is a capmember 30E with an upstanding wall 31E and a coupling means 32E, such asthreads or snap fit projections for engaging complementary engagementmembers, such as threads on the container 12. There is also a firstmoveable member, rotor, or rotatable disk 36E coupled to the inside ofthe cap 30E. The rotatable disk 36E includes a cutaway portion 38E thatallows product to be dispensed from the container 12 and into ameasuring chamber 33E of the cap 30E. A second movable member, rotor, orrotatable disk 43E is coupled to the outside of the cap 30E. The firstmember 36E is coupled to the second movable member 43E via a stub shaft48E with projections 49E extending between the two members. The stubshaft extends through an opening 34E in the cap member 30E between thetwo members. The projections engage the other member to connect the twomembers, such that they rotate together. As illustrated and discussedabove, the opening in each disk is rotatably off-set with respect toeach other. Accordingly, the contents of the container can never freelycommunicate with the environment outside the container.

As discussed above, a projecting tab 66E extends from the outerrotatable disk 43E. The tab 66E extends from the disk 43E in a directiongenerally parallel with the axis of the disk 43E. However, in otherembodiments, the tab 66E can extend in other directions. The tab 66E isdimensioned and configured to extend toward the funnel 57′ and engagethe projection or tab 59′ on the funnel 57′ when the closure 10E isengaged with the dispenser 14′. As mentioned above, due to thisengagement, the funnel 57′ can drive the disks 43E, 36E on the closure10E to selectively rotate and dispense the contents of the container.Specifically, the funnel 57′ engages and drives the tab 66E on the outerdisk 43E, which causes rotation of the outer disk 43E, and due to theconnection between the inner disk 36E and the outer disk 43E, it alsocauses rotation of the inner disk 36E.

As illustrated in FIGS. 24-26, the outer disk 4SE includes a scrapingdevice 70E positioned on an edge of the opening in the disk 43E. Asshown in these drawings, the opening in the disk 43E is generally asector shaped opening. One edge of the sector shaped opening is providedwith a substantially concave shaped edge. The substantially concaveshaped edge terminates in a point or an edge forming an acute angle.This edge is dimensioned and configured to contact the opening 33E inthe cap 30E when rotated. As the edge passes by the opening 33E, itscrapes any caked or otherwise stuck materials from the outer surface ofthe opening 33E. Accordingly, with each rotation of the outer disk 43E,any materials stuck to the outer surface of the cap 30E adjacent theopening 3SE in the cap 30E should be substantially removed. As notedabove, this scraping interface 70E is provided with a generally concaveshape. This shape has been shown to help prevent the scraped materialsfrom collecting on the outer surface of the outer disk 43E. However, inother embodiments, this scraping interface 70E can be provided withdifferent configurations. For example, the surface of the scrapinginterface 70E can be substantially flat.

In some embodiments of the closure, the shape of the dosing hole 33E hasbeen altered. For example, in the illustrated embodiment of FIGS. 24-27,the dosing hole 33E through the cap member 30E is substantiallycircular. However, in other embodiments, such as the embodimentillustrated in FIGS. 28-30, the dosing hole 33E is more rectangular.More specifically, the shape is a truncated sector, a curved rectangle,or curved trapezoid. In such embodiments, it has been found that somepowdered materials are more likely to be encrusted on the closure 10with this shape than with the circular shape. This may be due to thecorners in this configuration, which tend to provide a location formaterials to encrust and build-up.

As shown in the embodiment illustrated in FIGS. 25-27, the closure 10Ecan also be provided with elastic fingers or flippers 68E configured andpositioned to sweep the contents out of the dosing hole 33E in the cap30E. The fingers 68E extend from the inner disk 36E toward the innersurface of the cap member 30E. Due to this configuration and thetolerances between the cap and the inner disk, the fingers 68E aregenerally biased or bent-over by the cap 30E at most times. However,once the fingers 68E become substantially aligned with the dosing hole33E in the cap 30E, the elastic forces of the fingers 68E cause them tobias back into an extended, substantially non-bent (or less bentposition) position, which allows the fingers 68E to extend into thedosing hole 33E. By extending into the dosing hole 33E, the fingerssweep, push, or otherwise provide a force generally sufficient to clearmost of the powder from the hole 33E. Note that the fingers 68E arepositioned on the inner disk 36E at an appropriate position so that theyalign with the hole 33E in the cap 30E when the outer disk 43 moves suchthat the hole 33E is in an open position. In other words, the fingers68E extend into the hole 33E in the cap 30E when the inner disk 36E isin a closed position relative to the hole 33E and the outer disk 43E isin an open position with respect to the hole. As best shown on FIG. 27,the fingers 68E are located within a recess 72 of the inner disk 36E.This recess 72 generally extends from inner disk 36E away from the capmember 30E. With such a configuration, the fingers 68E are provide withsome clearance to bend (when not aligned with the hole 33E), which canreduce the friction between the cap 30E and inner disk 36E.

One other difference between the embodiment shown in FIGS. 25-27 and theembodiments presented earlier is that the closure 10E or cap 30E of thisembodiment is provided with a curved or generally funnel-shaped innersurface. The shape of this surface provides an advantage of funnelingthe contents of the container to the opening in the closure. As such,the contents of a container having this shape to the cap may dispensebetter.

A better understanding of the metering and dispensing device illustratedin FIGS. 13-27 will be had by a description of its operation. Thedispensing closure 10E coupled to container 12′ filled with a powderedmaterial. The dispensing closure 10E and the container are supported inthe dispensing receptacle 14′ as shown in FIG. 13.

When it is desired to dispense the powdered or granulated materialswithin the container 12′, the drive member 22′ is actuated to cause thefunnel 57′ to rotate. Rotation of the funnel 57′ causes the disks 36E,43E on the closure 10E to rotate. Specifically, engagement between aprojection 59′ on the funnel 57′ and a projection on the outer disk 43Eof the closure 10E cause the transfer of power from the funnel 57′ tothe closure 10E. Actuation of the outer disk 43E causes the inner disk36E to rotate as described above.

When powdered material is to be dispensed from the container 12, therotatable disks 36E and 43E will be placed in the position shown inFIGS. 3 and 3A. Note that although FIGS. 3 and 3A illustrate a differentembodiment, some of the main principles of operation are consistentbetter these two embodiments. Accordingly, earlier embodiments may bereferenced to indicate relative positions of the disks with respect toeach other. As shown in FIGS. 3 and 3A, the inner disk 36E is positionedto allow the contents of the container 12 to communicate with theopening 33E in the cap member 30E (open position) and the outer disk 43Eis positioned to block the flow of materials out of the opening 33E inthe cap member 30E (closed position). In this position, the granular orpowdered materials within the container 12 flow into the opening 33E inthe cap 30E. Since the outer disk 43E blocks the flow of materials outof the opening 33E (or measuring chamber) in the cap 30E, a specificknown amount of material can flow into and fill the opening 33E.

To dispense the materials contained within the opening 33E of the cap30E, the inner and outer disks 36E and 43E are rotated through aposition illustrated in FIGS. 4 and 4A to a position as illustrated inFIGS. 5 and 5A. In this position, the inner disk 36 blocks the opening33 in the cap member 30 and the outer disk 43 is positioned to allowmaterials to flow out of the opening 33 in the cap 30. Accordingly, thematerials within the opening 33 can fall out of the opening 33 in thecap 30. Further, although it is not illustrated, the fingers or flickers68E on the inner disk substantially align with and resiliently extendfrom a biased or bent over position to a substantially extended positionwhile the outer disk 43E allows the opening 33E to be open. Theextension of these fingers 68R help to remove most additional materialsthat may be building up or caked within the opening 33E.

Once the measured amount is dispensed, the disks preferably continue torotate to a position wherein the outer disk 43E closes or blocks theopening 33E in the cap 30E. This will help prevent moisture fromentering the opening 33E in the closure 10E. Most preferably, the disks36E, 43E on the closure 10E stop in a position wherein both the innerdisk 36E and the outer disk 43E are positioned to block or close theopening 33E. While moving to one of these preferred positions, thescraping device 70E on the outer disk 43E passes over the outer rim orsurface of the opening 33E in the cap 30E and engages stuck, caked, orencrusted materials on the outer surface of the opening 33E to removethose materials.

Once the powdered or granular materials are dispensed from the container12 via the closure 10E, the materials fall into the funnel 57′ and areflushed from the funnel 57′ by water entering the funnel 57′. Rotationof the funnel 57′ helps assure that the water flushes all materials outof the funnel 57′. Once the chemicals are mixed with the water, they canbe dispensed via the outlet 20′.

Referring to FIGS. 28-30, a metering and dispensing closure 10F isillustrated. This metering and dispensing closure 10F is configured anddimension to operate with the dispenser or receptacle 14′ illustrated inFIG. 13. This metering and dispensing closure 10F is composed of thethree basic components discussed above in the previous embodiments(i.e., a cap member 30, rotatable disk 36, and rotatable disk 43).However, this embodiment also includes many of the additional featuresof the embodiment illustrated in FIGS. 25-27, such as the projecting tab66F mentioned above to allow the closure 10F to be driven by the funnel57′, the resilient FIGS. 68F adapted to assist with clearing out anopening 33F in the dispensing closure 30F, the scraping member 70F onthe outer disk 43F, and the generally concave shape of the closure 10Frelative to the container. For a detailed description of these features,please reference the embodiments described above. The focus of thedescription of this embodiment will be on the features of thisembodiment that are substantially different than the previousembodiments.

One distinct difference between this embodiment and the previousembodiments is the shape of the opening 33F in the cap member 30F. Inthe previous embodiments, the shape of the dosing hole 33F issubstantially circular. However, in this embodiment, the dosing hole 33Fis more rectangular. More specifically, the shape is a truncated sector,a curved rectangle, or a curved trapezoid. Due to this configuration,the recess 72F housing the resilient fingers 68F also has a similarshape.

With reference to FIGS. 29 and 30, it can be seen that this embodimentis provided with a hook-like member 76F that extends from the inner disk36F. This hook-like member 76F stirs, agitates, and/or drivesdispensable materials within the container toward the opening 33F in theclosure 10F. Accordingly, with such a feature, the container may bebetter depleted relative to the previous embodiments. As illustrated,the hook-like member 76F generally extends along and adjacent the innersurface of the cap 30F. The hook-like member 76F is also generallycurved to follow the generally concave profile of the cap 30F.

FIGS. 31-36 illustrate another closure 10G adapted to be used with thedispensing assembly shown in FIG. 13. This closure 10G has many featuresin common with the previous embodiments, but operates under a slightlydifferent principle than the previous embodiments. The previousembodiments used two moving members (e.g., disks 36, 43) to selectivelyblock and unblock a static, non-moving aperture or measuring chamber 33in the cap 30. This embodiment, however, constructed slightly differentthan the previous embodiments to incorporate a moving measuring chamber.

Like the previous embodiments, this embodiment includes a cap member 30Gand two moveable members 36G, 43G to meter the dispensing of contentsfrom a container 12′ coupled to the closure 10G. However, the closure10G of this embodiment arranges the moveable members 36G, 43G in amanner somewhat different from the previous embodiments. The cap 30Ggenerally has many features in common with the previous embodiments,such as a generally concave shape to funnel materials to an aperture 33Gin the cap 30G and walls that engage a container. Accordingly, thesefeatures will not be discussed in depth.

As shown in FIGS. 31-36, this closure 10G includes a cap member 30G, anouter rotor or rotating disk 43G, and an inner rotor or rotating disk36G. The closure 10G also includes a baffle plate 80G and a rotatinghook-like member or arm 76G. The cap member 30G has an inner surfacerelative to the container that it is adapted to be coupled to and anouter surface. The inner surface is generally concave shaped to helpdirect materials within the container to a dispensing position and tobetter deplete the bottle. The outer surface of the cap 30G that ispositioned adjacent the outer rotor 43G is generally flat. Thisgenerally flattened surface has been found to prevent encrustation orother build-up of dispensed product. The cap member 30G has twoapertures in this generally flattened surface. One aperture 34G issubstantially centered in the cap 30G to receive a shaft. The otheraperture 33G is generally off-center. This second aperture 33G definesan opening in the cap member wherein materials contained within thecontainer 12 can be dispensed.

As previously described, the outer rotor 43G is positioned on theoutside surface of the cap 30G. The outer rotor 43G has a shaft 48G thatextends through the cap 30G to define a pivot for the rotor 43G. Asshown in the figures, the outer rotor 43G has a generally sector-likeshape configured and dimensioned to selectively block the opening 33G inthe cap 30G. Rotation of the outer rotor 43G causes the rotor toselectively block and unblock the opening 33G in the cap 30G. The outerrotor 43G can be driven many ways, as described above. However, in theillustrated embodiment, a projecting member 66G, such as an arm or tab,extends from the outer rotor in a generally radial direction. Thisprojecting member 66G is engaged by and driven by the projection drivemember 59′ on the funnel 57′, as described above. The outer rotor 43Ealso has a scraping member 70G, as described above, which engages thesubstantially flat outer surface of the cap 30G to remove caked,encrusted, or otherwise stuck dispensed materials.

The inner rotor 36G is positioned on the inside of the cap 30G and restswith a recess 82G of the cap (FIG. 36). Like the previous embodiment,the inner rotor 36G is coupled to the outer rotor 43G such that rotationof one rotor causes rotation of the other rotor. Specifically, asillustrated, the inner rotor 36G is coupled to a shaft 48G extendingfrom the outer rotor 43G. As best illustrated in FIG. 36, the innerrotor 36G has a generally circular body and an aperture 38G extendingthrough the body. A wall 39G extends in a generally axial directionadjacent this aperture to at least partially define a metering chamber.As mentioned above and described in greater detail below, this meteringchamber rotates with the inner rotor 36G to deliver a predeterminedquantity of product from within the container 12 to the aperture 33G inthe cap 30G. This wall 39G positioned adjacent the aperture 38G acts asa ram to drive the predetermined quantity of material to a dispensingposition. In some embodiments, this wall 39G or additional wallsextending from the inner rotor 36G can have an interfering fit againstthe cap 30G so that the wall 39G may be slightly flexed when not alignedwith the opening 33G in the cap 30G. When the wall 39G passed over theopening 33G or other slightly projecting member on the inner surface ofthe cap 30G, it can momentarily get caught against the opening 33G orprojecting member. Once the wall 39G flexes sufficiently due tocontinued rotation of the rotor 36G, the wall 39G will be resilientlybiased back to a less flexed position. This biasing will causesufficient vibration to release stuck, caked, or compacted materialswithin the opening or measuring chamber.

As mentioned above and shown in FIGS. 31, 35, and 36, the closureincludes a baffle plate 80G. The baffle plate 80G is coupled to the cap30G in a non-rotatable manner. The baffle plate 80G is positionedadjacent the inner rotor 36G. When the baffle plate 80G is coupled tothe cap 30G, the baffle plate 80G at least partially forms a recess 82Gwithin the cap 30G for housing the inner rotor 36G. The baffle plate 80Ghas an aperture 84G to allow materials within the container 12 to movepassed the baffle plate 80G and enter the measuring chamber 38G of thesecond rotor 36G, when the second rotor 36G is properly aligned withaperture 84G in the baffle plate 80G.

Finally, as noted above, the closure 10G also has a hook-like member orarm 76G that rotates adjacent the baffle plate 80G. This hook-likemember 76G helps to deliver materials within the container to theopening 84G in the baffle plate 80G.

In operation, the rotors 36G, 43G are rotated to selectively dispenseproduct from the container. During the rotation of the rotors, theopening 30G in the inner rotor 36G will be placed in communication withthe contents of the container 12. Specifically, this occurs when theopening 38G in the inner rotor 36G at least partially aligns with theopening 84G of the baffle plate 80G. During this time when the innerrotor 36G is in communication with the contents of the container 12, theopening 38G in the inner rotor 36G will fill with a predetermined amountof material. As the inner rotor 36G rotates, eventually, the opening 38Gin the inner rotor 36G is no longer in communication with the opening84G in the baffle plate 80G. Accordingly, no more materials from thecontainer 12 can enter the opening 38G in the rotor 36G. At this point,the materials contained within the inner rotor 36G are neither incommunication with the contents in the container or the environment.These materials are not in communication with the environment outsidethe container because the opening 38G in the inner rotor 36G is not yetaligned with the opening 33G in the cap 30G. Once the opening 38G in theinner rotor 36G is at least partially aligned with the opening 33G inthe cap 30G, materials can begin to exit the inner rotor 36G and cap30G. Through continued rotation of the inner rotor 36G, the entirecontents of materials contained within the opening 38G of the innerrotor 36G should exit the container 12 via the opening 33G in the cap30G. Further rotation of the rotors allows the outer rotor 43G to passover the opening 33G in the cap 30G and block the opening 33G.Accordingly, this can prevent moisture from entering the opening 33Gwhen materials are not being dispensed. As the outer rotor 43G passesover the opening 33G, the scraping member 70G removes any encrusted orotherwise stuck materials from the cap 30G.

The dispensing closure of this invention has been described inconjunction with particular configurations of receptacles or dispensingassemblies. It should be understood that any type of receptacle ordispensing assembly can operate in conjunction with this dispensingclosure. They do not necessary have to have a receptacle dispensingassembly that contains water. For example, they could be utilized in areceptacle and supported therein where the powder material would dropinto another container having a liquid predisposed therein. Neither isit necessary that the dispensing closure be employed in conjunction witha receptacle or dispensing assembly employed with water. Other liquidssuch as water miscible and immiscible solvents including water and ethercould be employed.

Additionally, the dispensing closures illustrated herein can be utilizedwith other containers. For example, in some embodiments, the containermay have two or more chambers containing separate chemicals within eachchamber. The chambers can be utilized to keep two or more chemicalsseparate from each other until dispensed. In one particular example itmay be desirable to separate the chemicals due to their storageincompatibility. In such an embodiment, the closure could be providedwith an opening communicating with each chamber. One complete rotationcould then dispense the materials contained within each chamber eithersimultaneously or sequentially depending upon the configuration of theclosure.

As mentioned above in the background section, one particular advantageof the illustrated closures is that they provide greater flexibilitywith respect to the formulations dispensed for cleaning applications.Conventionally, detergents, the most commonly fed powders, are limitedto formulations that will not create excess exothermic heat if thesubstantial moisture should penetrate into the powder. This hastypically meant that the caustic (typically NAOH or KOH) level needed tobe kept below about 40% to prevent the possibility of steam generationwithin the container. However, with the metering and dispensing closuresof this invention this limitation is substantially removed due to theinability of moisture to enter the container because of the constructionof the closure. Accordingly, more powerful detergent powders can beformulated with perhaps up to 70% caustic concentrations without thethreat of exothermic heat generation. This would represent a 40% to 50%increase in “power” in a single container.

The embodiments described above and illustrated in the figures arepresented by way of example only and are not intended as a limitationupon the concepts and principles of the present invention. As such, itwill be appreciated by one having ordinary skill in the art that variouschanges in the elements and their configuration and arrangement arepossible without departing from the spirit and scope of the presentinvention. For example, the moveable members, rotors, or disks describedabove can move in manners other than those described above.Specifically, the moveable members can also include sliding members thatmove in a linear, curvilinear, or other path between open and closedpositions to selectively block the aperture in the cap. Furthermore,various alternatives to the certain features and elements of the presentinvention are described with reference to specific embodiments of thepresent invention. With the exception of features, elements, and mannersof operation that are mutually exclusive of or are inconsistent witheach embodiment described above, it should be noted that the alternativefeatures, elements, and manners of operation described with reference toone particular embodiment are applicable to the other embodiments.

All such and other modifications within the spirit of the invention aremeant to be within the scope as defined by the appended claims.

Various features of the invention are set forth in the following claims.

What is claimed is:
 1. A dispensing apparatus comprising: a frame; acontainer coupled to the frame, the container containing a granular orpowdered material and having a closure that selectively dispenses thematerial from the container via rotation of at least a portion of theclosure, the closure having a cap, a first rotor, and a second rotor,the cap is received on the container and has an inside face, an outsideface, and an aperture extending from the inside face to the outside facethrough the cap to allow materials within the container to be dispensed,the first rotor is positioned adjacent the inside face of the cap toselectively block the aperture in the cap, the first rotor beingrotatable between a first position in which the aperture is blocked anda second position in which the aperture is not blocked, the second rotoris positioned adjacent the outside face of the cap to selectively blockthe aperture in the cap, the second rotor is rotatable between a firstposition in which the aperture is blocked and a second position in whichthe aperture is not blocked, rotation of the first rotor and the secondrotor is sequenced such that at least one of the rotors is alwaysblocking the aperture; a drive member coupled to the frame andactuatable to rotate a portion of the closure relative to the frame; areceptacle positioned to receive material dispensed from the cap andhaving an opening through which material from the cap is dispensed intothe receptacle, the opening substantially facing the cap in allpositions of the first and second rotors; a sensor operable to sense therotational position of the first and second rotors relative to theaperture of the cap and stop the drive member only when the sensordetermines a rotational position of at least one of the first and secondrotors.
 2. The dispensing apparatus of claim 1, wherein the sensor is aHall effect sensor that senses the position of a magnet.
 3. Thedispensing apparatus of claim 2, wherein the magnet is moved in responseto the drive member.
 4. The dispensing apparatus of claim 1, wherein theinside face of the cap is generally concave.
 5. The dispensing apparatusof claim 1, wherein the second rotor has a generally planarconfiguration adjacent the aperture.
 6. The dispensing apparatus ofclaim 1, wherein the first rotor has at least one protrusion movable toeject material from the aperture.
 7. The dispensing apparatus of claim1, wherein the sensor controls activation of the drive member through apredetermined number of rotations of the first and second rotors.
 8. Thedispensing apparatus of claim 1, wherein the sensor controls activationof the drive member to stop the first rotor and second rotor.
 9. Thedispensing apparatus of claim 1, wherein the first rotor has ahook-shaped portion extending toward the container.
 10. The dispensingapparatus of claim 1, wherein the second rotor has a protrusionextending in a direction substantially axially away from the container.11. The dispensing apparatus of claim 1, wherein the container isremovable from the frame.
 12. The dispensing apparatus of claim 1,wherein the receptacle comprises a funnel into which material from thecontainer is dispensed upon rotation of the first and second rotors. 13.The dispensing apparatus of claim 12, wherein the funnel is rotatablewith respect to the container.
 14. The dispensing apparatus of claim 13,wherein a portion of the funnel drives at least one of the first andsecond rotors to rotate.
 15. The dispensing apparatus of claim 13,wherein the portion of the funnel engages at least one of the first andsecond rotors.
 16. The dispensing apparatus of claim 13, wherein thefunnel is driven to rotate by the drive member.
 17. The dispensingapparatus of claim 13, wherein the drive member is located laterallyadjacent the funnel.
 18. The dispensing apparatus of claim 1, whereinthe sensor is operable to stop the drive member only when the sensordetermines at least one of the first and second rotors covers theaperture.
 19. The dispensing apparatus of claim 1, wherein the sensor isoperable to stop the drive member only when the sensor determines thatboth of the first and second rotors cover the aperture.
 20. Thedispensing apparatus of claim 1, wherein the first and second rotors areengaged with one another through the cap.
 21. A dispensing apparatuscomprising: a frame; a container coupled to the frame, the containercontaining a granular or powdered material and having a closure thatselectively dispenses the material from the container via rotation of atleast a portion of the closure, the closure having a cap, a first rotor,and a second rotor, the cap is received on the container and has aninside face, an outside face, and an aperture extending from the insideface to the outside face through the cap to allow materials within thecontainer to be dispensed, the first rotor is positioned adjacent theinside face of the cap to selectively block the aperture in the cap, thefirst rotor rotatable about an axis of rotation of the first rotorbetween a first position in which the aperture is blocked and a secondposition in which the aperture is not blocked, the second rotor ispositioned adjacent the outside face of the cap to selectively block theaperture in the cap, the second rotor being rotatable between a firstposition in which the aperture is blocked and a second position in whichthe aperture is not blocked, rotation of the first rotor and the secondrotor is sequenced such that at least one of the rotors is alwaysblocking the aperture; a drive member coupled to the frame andactuatable to rotate a portion of the closure relative to the frame; areceptacle rotatable about an axis of the receptacle that issubstantially parallel to that of the first rotor; and a sensor operableto sense the rotational position of the first and second rotors relativeto the aperture of the cap and stop the drive member only when thesensor determines a rotational position of at least one of the first andsecond rotors.